return ssaConfig.ABI0.Copy() // No idea what races will result, be safe
}

// abiForFunc implements ABI policy for a function, but does not return a copy of the ABI.
// Passing a nil function returns the default ABI based on experiment configuration.
func abiForFunc(fn *ir.Func, abi0, abi1 *abi.ABIConfig) *abi.ABIConfig {
	if buildcfg.Experiment.RegabiArgs {